I would be happy to discuss the science, and how it impacts equality.
I do think it is a huge factor, and one that isn’t discussed enough.
The truth is I would have rather chopped my leg off than leave my baby in the newborn stages. Did I choose this reaction? No. Did it stem from my personality or from the intellectual side of my brain? Absolutely not. I am the least maternal person in the world, and I became a hawk around my newborn - overnight.
You are suggesting that the biologically driven maternal care magically evaporates at school age. I entirely disagree. I think it naturally eases as a child enters puberty, and beyond, and lessens as the child ages but not by much. Most mothers will prioritise their young, even at school age, over all else.
I said for ‘many women’ ambition is reduced or in some cases entirely lost when they enter motherhood, I did not say all.
Many of us enjoy a second wind and a revitalised energy for career progression as children become older, and focus returns.
Many do not, some will struggle with the onset of the menopause and other caring duties, their energy depleted by years of hard graft and child rearing.
My conclusion is that if you wish to be equal in all ways, and enjoy a career without compromising your child/children then an only child might be the best solution - or no children.
If you are looking to have multiple children and the toll that takes on the body, energy levels and resources - then maybe factor in the inevitable damage to your career and financial health. No one woman can do it all, we have established that at least.
Women can choose what is right for them, where their priorities lie, and make conscious and informed decisions for themselves. They don’t need to be told what to do.